PDF malware analysis — malicious · 7f68689c5a1220a8

MALICIOUS

PDF

35.8 KB Created: 2021-07-02 00:36:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 81b3cf594549b9f4afe176ea8670d8f9 SHA-1: 20d015fb007af4540bc8f45c9e93939625b06cde SHA-256: 7f68689c5a1220a825bc5f64af9f4da35d60265941b414f5ec0262c436f79d6c

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed to trick users into downloading potentially malicious files by impersonating brands and offering game-related cheats. The embedded links, such as http://netcdn.co/app/431946152/free-roblox-clothes-codes-2021-game-hack, redirect to known malicious infrastructure, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/free-roblox-clothes-codes-2021-game-hack.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://netcdn.co/app/431946152/free-roblox-clothes-codes-2021-game-hack In PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-exploit-roblox-mega-download_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/roblox-2021-free-hat_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/robux-cheat-engine-2021_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/fly-hack-script-roblox_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/roblox-bleach-hack_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/download-roblox-hack-robux-apk_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-hacking-fast_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/medival-gives-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/robux-free-roblox-glitch_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-doge-mask-in-roblox_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/april-fools-day-2021-hack-roblox_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-robux-today_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-robux-obby-limited-time-only-games_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-to-fly-using-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/roblox-clothes-girl-free_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-passwords_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-level-7-script-for-roblox_GM431946152.pdfIn PDF document text
- https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-code-card-roblox_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000033cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x33CC	22216 bytes
SHA-256: `ee1dcff8773e1ba7120fe6d9e624cec6a3b665d651eb07e7f61825b6cdb200f8`
`font_01_sfnt_off0000654d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x654D	19496 bytes
SHA-256: `74dfc6d7e7aaf2f0a9a52c3c213569e692a6683ce092b385525b2c9883290df7`

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